Thread: Opening a TIFF file

Gudday all
I am trying to move TIFF files on the same server from one location to another. I have tried many things but my latest attempt is to open the file, read it in and write that same file to the new location.
I thought it would be easy but I keep getting unable to open file errors.
The copy function is

Code:

void copy(char *srcFilename, char *dstFileName)
{
FILE *fsrc, *fdst;
char c;

printf("Inside copy function\n");
fsrc=fopen(srcFilename, "rb");
if (fsrc==NULL) {
	printf("Couldn't open file %s for reading.\n", srcFilename);
    exit(0);
}
 /* Add usual error check */
fdst=fopen (dstFileName, "w");
/*Add usual error check */
for ( ; !feof(fsrc); )
fputc (fgetc (fsrc), fdst);
fclose (fsrc);
fclose (fdst);
}

and I call it using

Code:

copy(tiff_file, tiffLine);

where tiffline is the destination and has the form "c:\TestingTiffMoves\AU\PICKLIST\0000544B.TIF" .
The path is fixed but the file name will be variable in name but not in length.
tiff_file is the local file, in this case "0000544B.TIF"

The error message is "Couldn't open file 0000544B.TIF for reading."

Is there a trick to this that I am missing?

Also how to we express paths in C? I am giivng the absolute path at present. Is it possible to use relative paths? If so what is the format?

The backslashes needs to be doubled, since one backslash is an escape char in C.

"\\test.txt", instead of "\test.txt" to open the test.txt file on the drive's root directory.

Relative paths are supported.

The path is coming from a file created previously.
The contents of the file (each line is tiffline) looks like

Code:

c:\TestingTiffMoves\AU\PICKLIST\0000544B.TIF
c:\TestingTiffMoves\AU\PICKLIST\0000544C.TIF
c:\TestingTiffMoves\AU\PICKLIST\0000544D.TIF
c:\TestingTiffMoves\AU\PICKLIST\0000544E.TIF

The c: is not a part of the code that creates the file contents. I added that to see if it needed the full path to be able to open the file for writing but it is not getting that far anyway.

Is

Code:

fsrc=fopen(srcFilename, "rb");

sufficient to open the TIFF file or do I need more?

If you make a tiny test.txt file, you can see this program at work

Code:

//snippet to show opening of a file

#include <stdio.h>

int main(void)  {
  FILE *in;
  int ch;
  char fname[20];  
  putchar('\n');

  //either of these string literals work OK.
//  in = fopen("C:\\tc\\bin\\test.txt", "rt");
  in = fopen("C:/tc/bin/test.txt", "rt");

  //curly braces are not required here, since the while statement   
  //is only one statement on two lines. Helps for clarity, however.
  if(in) { 
     while((ch=fgetc(in)) != EOF)
        printf("%c", ch);
  }
  else  {
    printf("\n Error opening file test.txt. Program terminated.\n");
    return 1;
  }
  
  fclose(in);

  //end of filename as a string literal
  //start building up a char array into a filename
  putchar('\n');
  fname[0] = 't';
  fname[1] = 'e';
  fname[2] = 's';
  fname[3] = 't';
  fname[4] = '.';
  fname[5] = 't';
  fname[6] = 'x';
  fname[7] = 't';
  fname[8] = '\0';

  in = fopen(fname, "rt");
  if(in)                //showing the curly braces aren't necessary
     while((ch=fgetc(in)) != EOF)
        printf("%c", ch);
  else  {
    printf("\n Error opening file test.txt for the second time. Program terminated.\n");
    return 1;
  }
  ch = getchar();
  fclose(in);
  return 0;
}

Originally Posted by jam00

A +ve number a is a proper factor of X if X is a multiple of a and a does not equal 1 or X. The user gives a int[] factors containing all the proper factors of int X.
This program should return X to the user.
Could someone help me with the algoirthim of this problem it is like getting the all the possible factors of a number but the oppisite way.

thanx! [:

Don't try to hijack threads, don't break forum rules.
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Adak
I complied your program and ran it but it nevers gets to the 'error opening for the 2nd time' as it fails the 1st run everytime. The program cannot find "C:/tc/bin/test.txt", "rt" as it never gets created.
Perhaps my ignorance is appalling?

If I were to make filename[len] = 0 would that make sure the any newlines/carriage returns on the end of the fle name were removed or rather neutralised?

Yes my ignorance is appalling.

I have now created test.txt (with content "Does this work ok?") and it does the 1st run, printing out the content, and fails at the 2nd.

Looking at your code I think it failed the 2nd run because the path was wrong. Test.txt is not in the same directory as the executable. When I put test.txt in the same directory as the executable it printed out the contents twice.

I'll try stripping off the '\n' and replace with '\0'.